Permanent magnetic device

Abstract

An apparatus to operate with a rotor includes a plurality of permanent magnetic components and a plurality of hydraulic cylinders. The permanent magnetic components are arranged to surround the rotor. The hydraulic cylinders are coupled to permanent magnetic components and are connected via at least one hydraulic tube.

The invention claimed is: 
     
       1. An apparatus to operate with a rotor comprising:
 a plurality of permanent magnetic components having a same magnetic pole as a magnetic pole of the rotor, the permanent magnetic components arranged to surround the rotor; and 
 a plurality of hydraulic cylinders, each coupled to each of the plurality of permanent magnetic components, the hydraulic cylinders being connected to each other via at least one hydraulic tube. 
 
     
     
       2. The apparatus of  claim 1 , wherein the number of the permanent magnetic components is four and the number of the hydraulic cylinders is four,
 wherein the four permanent magnetic components are spaced from each other by a same angular distance, and 
 wherein two opposite hydraulic cylinders are connected to each other via a first hydraulic tube, and the other two opposite hydraulic cylinders are connected to each other via a second hydraulic tube. 
 
     
     
       3. The apparatus of  claim 1 , wherein each of the hydraulic cylinders comprises a piston configured to be at least partially contained in the hydraulic cylinder and to move in the hydraulic cylinder, wherein the piston comprises one end coupled to a corresponding permanent magnetic component, and the other end having a flange. 
     
     
       4. The apparatus of  claim 3 , wherein each of the hydraulic cylinders further comprises a stopper configured to protrude from an inner surface of the hydraulic cylinder toward the piston, to surround the piston, and to have an inner diameter smaller than a diameter of the flange,
 wherein the piston can be stopped by the stopper when the flange reaches the stopper. 
 
     
     
       5. The apparatus of  claim 1 , further comprising at least one accumulator connected to the at least one of the hydraulic tubes to prevent a surge of hydraulic pressure in the at least one of the hydraulic tubes. 
     
     
       6. The apparatus of  claim 2 , wherein the first and second hydraulic tubes are configured to be communicated to each other at a portion of the first and second hydraulic tubes. 
     
     
       7. An apparatus comprising:
 a rotor, having a magnetic pole, configured to rotate around an axis and to have a flange on a lower portion of the rotor; 
 an upper bearing configured to surround an upper portion of the rotor, the upper bearing comprising:
 a first group of permanent magnetic components having a same magnetic pole as the magnetic pole of the rotor and arranged to surround the upper portion of the rotor; and 
 a first group of hydraulic cylinders, each coupled to each of the first group of permanent magnetic components, the hydraulic cylinders connected to each other via at least one hydraulic tube; and 
 
 a lower bearing configured to surround the flange of the rotor, the lower bearing comprising:
 a second group of permanent magnetic components having a same magnetic pole as the magnetic pole of the rotor and arranged to surround the flange of the rotor and to support the rotor against a weight of the rotor; and 
 a second group of hydraulic cylinders, each coupled to each of the second group of permanent magnetic components, the hydraulic cylinders connected to each other via at least one hydraulic tube. 
 
 
     
     
       8. The apparatus of  claim 7 , wherein a side of the flange is downwardly slanted and upper ends of the second group of permanent magnetic components are slanted to match to the slanted side of the flange. 
     
     
       9. The apparatus of  claim 7 , further comprising a flywheel attached on a portion of the rotor between the upper portion and the lower portion, the flywheel configured to keep a rotational speed of the rotor. 
     
     
       10. The apparatus of  claim 7 , further comprising a protection bearing arranged on a portion of the rotor where the upper and lower bearings are not arranged, the protection bearing configured to reduce a friction force on the rotor when the upper or lower bearing is broken. 
     
     
       11. The apparatus of  claim 10 , wherein the protection bearing is a sliding bearing or a rolling bearing. 
     
     
       12. The apparatus of  claim 7 , further comprising a third group of permanent magnetic components having a same magnetic pole as the magnetic pole of the rotor, the third group of permanent magnetic components being arranged over a surface of the flange opposite to the surface facing the second group of permanent magnetic components. 
     
     
       13. The apparatus of  claim 12 , wherein the third group of permanent magnetic components push down the flange of the rotor to prevent a vertical movement of the rotor. 
     
     
       14. The apparatus of  claim 7 , further comprising at least one accumulator, connected to the at least one hydraulic tube of the upper bearing to prevent a surge of hydraulic pressure in the at least one hydraulic tube of the upper bearing. 
     
     
       15. The apparatus of  claim 7 , further comprising at least one accumulator, connected to the at least one hydraulic tube of the lower bearing to prevent a surge of hydraulic pressure in the at least one hydraulic tube of the lower bearing.